Pasteurizer



J. C. MILLER.

PASTEURIZER.

APPLLCATION man AUG-9. ms.v

Patented May 18, 1920.

2 SHEETS-SHEET 2.

ATTORNEYS UNITED STATES OFFICE;

JOHN C. MILLER, OF LUDLOW', KENTUCKY, ASSIGNOR TO THE EVAPORATING AND DRYING MACHINERY COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

PASTEURI'ZER;

Application-filed August 9, 1915.

T call to 700m 2'25 may concern Be it known that I, JOHN C. MILLE a citizen of the United States, and a resident of the city of Ludlow, in the county of Kenton and State of Kentucky, have invented certain new and useful Improvements in Pasteurizers, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates" to machines for the heating and cooling of liquids, such as milk and the like.

The object of my invention is-to provide a machine for such pasteurization in which the process may be carried on much more expeditiously and effectively than in older machines with which I am familiar.

My special object is to spread out the liquid under treatment into as thin a film as possible, in order that the heating and cooling means may effect the result most rapidly and thoroughly, and my machine also embodies apparatus whereby I am enabled during. the treatment to hold the liquid which has been treated preliminarily such a length of time as to fully develop the undeveloped germs, which in the subsequent treatment are also destroyed-,all in one continuous operation;-

In the drawings,

Figure ].'is a side elevation of my improved machine.

Fig. 2 is a central longitudinal sectionof one of the pasteurizing devices;

Fig. 3 is a front elevation of the complete apparatus.

Fig. 4 is a detailed vertical section of a portion of the delivery end of one of the pasteurizing devices.

Fig. 5 is an end view of one of thepasteurizers.

1, 1, are the end standards or framework for supporting the apparatus, forming with the central standard 3' andtransverse beams 4 a solid and substantial framework to sustain the operating parts.

My heating and cooling devices are all constructedin the same way, so that a description of the details of construction of one of the heaters or coolers will beunderstood as describing, them all. I prefer to Specification of Letters Patent.

Patented May 18', 1920".

Serial No. 44,414.

provide two heating devices and two cooling. devices.

6 is-a cylindrical outer casing made ofany suitable material,- and open at each end, although a cover for each end may of course be provided to close the casing, and in which are secured two cylinders 7 and 8, preferably of sheet metal and preferably formed with corrugations helically disposed, as-illustrated in Figs.-2 and 4. These two helical'ly corrugated cylinders with their corrugations symmetrically disposed are closed at each end so as to form a long narrow -annularcompartment 9, and the inner cylinder 7 is open at each end.

The cylinders with the outer casing are mounted on the shaft 10 by the spokes or arms 11, 11, which come together at the center to form the hub 12-, and the shaft 10 at each end is suitably j ournaled in the'journal boxes 18, 13, so that the cylinders and easing rotate with the shaft, and the shaft is driven by the pulley 14 fixed thereon and connected with suitable power, so that the cylinders can be rotated at a very high rate of speed. 7

The heating or cooling liquid for either heating or cooling the innner cylinder 7 is supplied to one end of the chamber 9 through the pipe 15 opening into the chamber at 16- and into a passageway 17 in the shaft 10, which opens at 18 into the space 19 in the box 20. This box is mounted loosely on the shaft 10, and is provided with stufiing. boxes 21,22, to prevent leakage.

23 is a pipe which extends down into the bottom of the tank 24 in which the hot water or other heating means is contained, he water being kept hot by steam coils or otherwise, as may be desired.

The circuit from the tank 24 through the chamber 9 and back to the tank is obtained by means of the pipe 25 which connects the opposite end of the chamber with the passageway 26 in the shaft 10 which opens into the space 27in the box 28, which, like the box 20 is' mounted loosely on the shaft 10 and is provided with stuffing boxes 29 and 30. From this box- 28 a pipe 31 leads back to the tank 24.

A pump may be used to enforce the' circulation of the heating or cooling medium through the corrugated cylindrical chamher of the apparatus, but ordinarily the rapid rotation of the cylinders will cause a sufiicient suction to enforce a circulation without the use of any pump.

The milk or liquid to be pasteurized is fed on to the inner surface of the corrugated cylinder 7 through the fixed pipe 32. The shaft 10 is hollow, and this pipe 32 passes through the center of the shaft and extends outwardly to the source of sup- 1 p The opposite end of the corrugated cylinder 7 is curved inwardly at 33 to form an annular collecting chamber 34, and 35 is a stationary pipe which enters-through a suitable opening in the hollow shaft 10 at the opposite end, in the same way that the supply pipe 32 is constructed. The end of this pipe 35 is curved over at 36 and turned so as to lie in the collecting chamber 34, and as the cylinder 7 is rotated at a high rate of speed, the milk collected in the collecting chamber will be drawn off through the pipe 35.

Mounted in the framework and supported in any suitable way, is a single large tank provided with partitions 38, indicated in dotted lines in Fig. 1, which divide the tank intosayeight separate receptacles or ves sels 37.

39 is the main supply pipe for conveying the liquid to these vessels, and 40 is the main discharge pipe for conveying the liquid from these vessels, and these two pipes 39 and 40 have branches 41 and 42,one branch into each tank, and the supply and discharge of the liquid in these pipes are controlled by the stop cocks 43, 44.

As it is desired to hold the liquid being treated for any desired length of time during the process of treatment, I connect the handles 45, 46, which control the stop cocks 43, 44, by connecting rods 47, 48, with a train of gears and clockwork arrangement inclosed in the box 49, the clockwork being driven by the pulley 50 and belt 51 from the main driving shaft of the apparatus.

I have not illustrated in detail this clockwork mechanism for actuating the connectins! rods 47 48, which control the supply and discharge valves, because this mechanism forms no part of my present invention, and it is old to provide mechanism to actuate va at stated intervals.

In any event, this valve actuating mechanism is so regulated and adjusted that in proportion to the number of gallons of liquid fed to the machine per minute, the inlet valves or stop cocks 43 shall be opened in succession, so that the entire series of tanks or receptacles shall be filledsayin such length of time as thirty minutes.

The pine 35 connects with and opens into the supply pipe 39 for these tanks, and from the discharge pipe 40 a delivery pipe 52 delivers liquid through the hollow shaft of the second cylinder against the rotating corrugated cylinder, and the liquid is acted upon as before, and is thence carried through pipe 53 to the third rotating cylinder which apparatus, however, is supplied with the cooling liquid through pipe 54. After passing through the third apparatus and being preliminarily cooled, the liquid is passed by the pipe 55 to the last of the devices illustrated, whence it is delivered through pipe 56.

The operation of the pasteurizer is sufficiently clear fromthe foregoing description. The corrugated cylinders mounted on the shafts 10 are driven at a very high rate of speed, and as stated, this high rate of speed is sufiicient to draw the heating or cooling liquid from the storage tanks into the heating or cooking chamber and to enforce the circulation back to the storage tank. The helically corrugated cylinder being driven at a 'high rate of speed as stated acts as a screw conveyer. The centrifugal force holds the liquid on the surface of the cylinder and the spirally arranged corrugations carry the liquid to the opposite end of the cylinder. The milk to be sterilized is fed to the first of the devices through the inlet pipe in such quantities that there will suflicient milk pass through the system in saythirty minutes to fill the tanks 37.

If there are eight of these tanks, the liquid to be treated is fed in sufiicient quantities to fill the first of the storage vessels in about four minutes, although, of course, it will be understood that in specifying time and number of tanks, I do not intend to limit the use of the a paratus to any specified time or number of tanks. The length of time the milk or liquid to be treated remains in the storage tanks is altogether dependent on the desires of the operator;

My apparatus is designed, however, to heat the milk or liquid under treatment in the first apparatus to such point as desired. This liquid is discharged into the first receptacle and continues to discharge into the first receptacle until the supply valve of the first tank is closed when the incoming liquid will be discharged into the second tank. This continues until all of the tanks are filled, and as the last of the tanks is being filled, the discharge valve for the first tank is opened to discharge the liquid that has been held at rest for the particular desired length of time to germinate and develop the undeveloped germs, and this liquid is delivered through pipe 52 to the second of the cylinders, where the temperature can be maintained at a very much higher degree and the liquid thoroughly sterilized and all the bacterial formation destroyed. The liquid is then delivered directly to the cooling vessels where it is partially cooled and then to the final vessel where it is thoroughly cooled and delivered through pipe 56.

I have explained my new apparatus in detail with reference to particular means for driving the apparatus and for transporting liquid through the apparatus. I do not wish to be understood, however, as limiting myself in any way to these particular details of construction, as the broad principle whereby I am enabled to present the liquid to be treated in a very thin film, so that it can be heated or cooled to the temperature of the heating or cooling medium almost at once, and by which I am enabled to retain the liquid at rest in the machine at any desired temperature and for any length of time, while at the same time carrying on the process of sterilization continuously :these features form the essential features of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a pasteurizing apparatus, a cylinder, with means for maintaining any desired temperature therefor, means for rotating the said cylinder at a high rate of speed, means for delivering the liquid to be treated against the inner surface of the cylinder, with the cylinder formed for forcing said liquid from one end of the cylinder to the other, and means for collecting the liquid therefrom during the rotation thereof.

2. In a pasteurizing apparatus, a horizontally disposed cylinder, with means for maintaining any desired temperature therefor, means for rotating the said cylinder at a high rate of speed, means for delivering the liquid to be treated against the inner surface of the cylinder, with the cylinder formed for forcing said liquid from one end of the cylinder to the other, and means for collecting the liquid therefrom during the rotation thereof.

3. In a pasteurizing apparatus, a cylinder, provided with a closed external cylindrical casing, and means for supplying a temperature controlling medium thereto, means for rotating the cylinder and casing at a high rate of speed, means for delivering the liquid to be treated against the inner surface of the cylinder, with the cylinder formed for forcing said liquid from one end of the cylinder to the other, and means for collecting the. liquid therefrom during the rotation thereof.

at. In a pasteurizing apparatus, a horizontally disposed cylinder, provided with a closed external cylindrical casing, and means for supplying a temperature controlling me dium thereto, means for rotating the cylinder and easing at a high rate of speed, means for delivering the liquid to be treated against the inner surface of the cylinder, with the cylinder formed for forcing said liquid from one end of the cylinder to the other, and means for collecting the liquid therefrom during the rotation thereof.

5', In a pasteurizing apparatus, a cylinder, with means for maintaining any desired temperature therefor, means for rotating said cylinder at a high rate of speed, means for delivering the liquid to be treated liquid to be treated against the inner sur--' face of the cylinder, and means for collecting the liquid therefrom during the rotation thereof, the cylindrical surface being corrugated helically to carry the liquid to one end of the cylinder, with the end of the cylinder curved inwardly to form a receptacle to receive the liquid.

7. In a pasteurizing apparatus, a horizontally disposed cylinder, provided with a closed external cylindrical casing, and means for supplying a temperature controlling medium thereto, means for rotating the cylinder and casing at a high rate of speed, means for delivering the liquid to be treated against the inner surface of the cylinder and means for collecting the liquid therefrom during the rotation thereof, the cylindrical surface being corrugated helically to carry the liquid to one end of the cylinder, with the end of the cylinder curved inwardly to form a receptacle to receive the liquid.

8. In a pasteurizing apparatus, a helically corrugated cylinder, and a hollow shaft upon which said cylinder is mounted, the cylinder and its shaft 'journaled to rotate horizontally, a shallow casing for the cylinder, fixed boxes mounted on said shaft at each end of the cylinder, a receptacle for the temperature controlling medium, pipes conneoting said boxes with the said receptacle, and pipes connecting the shallow casing with said boxes, whereby a complete circuit is maintained from the receptacle through the boxes and cylinder casing.

9. In combination, an open ended cylinder, means for maintaining the cylinder at any desired temperature, means for revolving the cylinder, means for feeding a liquid to the cylinder, and means for causing the liquid to travel through the cylinder on the inner surface thereof.

10. In combination, an open ended cylinder, a jacket therefor, means for supplying der, means for maintaining the cylinder at said jacket with a medium for controlling any desired temperature, means for revolv- 10 temperature, means for revolving the cylining the cylinder, means for feeding a liquid der, means for delivering liquid to the cylinto the cylinder, means for causing the liquid der, and means for causing the liquid to to travel through the cylinder on the inner travel through the cylinder on the inner sursurface thereof, and means for drawing off face thereof. 4 the liquid from the cylinder.

11. In combination, an open ended cylin- 7 JOHN C. MILLER. 

